JPH04118747U - Armature core for rotating electrical machines - Google Patents

Abstract

(57) [Summary] [Purpose] To enable continuous and efficient manufacturing of armature cores having core positioning protrusions on the lowest steel plate. [Structure] A series of steel plates forming the iron core are connected by providing a connecting projection 110 and a connecting recess 111 on each steel plate forming the iron core, and fitting the connecting projections and the connecting recesses of adjacent steel plates. A plurality of core positioning protrusions 112 are provided at intervals on the lowermost steel plate. Positioning protrusion housing holes 113 corresponding to each core positioning protrusion are provided in a predetermined number of steel plates near the upper end of the core. When a plurality of cores are stacked up and down, a core positioning protrusion of the upper core fits into a positioning protrusion housing hole of the lower core.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention is an armature core used in the stator of rotating electric machines such as magnet generators and magnet motors. It is related to.

0002

[Conventional technology]

Figure 6 shows an example of a conventional armature core used in the stator of a magnet generator. This figure shows an I-shaped armature core 1, which is hammered into a predetermined shape. It has a structure in which a predetermined number of punched steel plates are laminated, with holes penetrating in the lamination direction near both ends. Mounting holes 2, 2 are provided. The part located between the mounting holes 2 and 2 is The machine coil is wound.

0003 When fixing this armature core to a predetermined installation location, the magnetic pole faces 3 at both ends , 3 so that their central axes coincide with the central axis of the rotor (not shown). There is a need. Therefore, in the past, burring was applied to the steel plate located at the bottom in the stacking direction. The cylindrical core positioning protrusions 4, 4 that share the axis with the mounting holes 2, 2 are machined. The size of the stepped holes 6, 6 provided in the stator mounting portion 5 is The iron core is positioned by fitting it into the diameter part. Small diameter part of stepped holes 6, 6 is provided with a screw, which is inserted into the installation holes 2, 2 of the iron core and screws into the small diameter part of the holes 6, 6. The iron core 1 is fixed to the mounting portion 5 by the inserted bolts.

0004 In conventional armature cores, laminated steel plates were connected using rivets, but Using a rivet requires a process of caulking the rivet, which increases the number of man-hours. , higher costs could not be avoided.

[0005] Therefore, when punching steel plates, we formed connecting parts on each steel plate by press forming, and The connecting parts of the punched steel plates are successively connected to the connecting parts of the previously punched steel plates. The so-called progressive lamination method came to be used.

[0006] Figure 8 shows the structure of the connection part used in the progressive lamination method. By punching out a part of each steel plate 100 constituting the forming a connecting protrusion 101 and forming a connecting recess 102 on the back side of the connecting protrusion; By fitting the connecting protrusion 101 of each steel plate into the connecting recess 102 of the adjacent steel plate. The steel plates 1a, 1a, . . . are connected to each other without using rivets. The connecting protrusion 101 and the connecting recess 102 shown in FIG. It is formed by punching out the inner part of the parallel notches in a V shape, and each connecting protrusion By bringing the side surface of the raised part 101 into frictional contact with the cut surface 103 of the notch of the connecting recess 102. The steel plates are connected by this. Note that the connecting protrusion 101 and the connecting recess 1 02 need only have a shape that fits into each other, so the connecting protrusion and the connecting recess should be shaped like a U. It may also be formed into a shape.

[0007] As mentioned above, we use the progressive lamination method in which steel plates are connected by connecting protrusions and connecting recesses. In the case of stamping, a steel plate of a predetermined shape is punched out while progressively feeding a strip-shaped material steel plate. Each punched steel plate is successively stacked on top of the previously punched steel plate to create a series of adjacent steel plates. By fitting the connecting projection and the connecting recess, the laminated cores can be connected without using rivets. Since it can be manufactured continuously, it is possible to reduce the number of parts and assembly man-hours, reducing costs. It is possible to reduce the

[0008]

[Problem that the idea aims to solve]

If there is a core positioning protrusion 4 on the lowest steel plate as shown in Fig. 6, the following For the reasons shown in the following, it is not possible to incorporate the lamination of the bottom steel plate into the progressive lamination process. I couldn't come.

[0009] When manufacturing the armature core using the progressive lamination method, steel punched into a specified shape is used. In order to sequentially laminate and connect the plates, multiple laminates are placed under the punch of the press processing machine. It is formed by stacking iron cores. In this case, positioning is done on the lowest steel plate. When the female projection 4 is formed, the positioning projection 4 is located at the top of the iron core formed earlier. Since it collides with the upper surface of the steel plate, the progressive lamination method cannot be performed.

0010 Therefore, if there is a positioning protrusion 4 on the lowest steel plate, FIGS. 7 and 9 (A ), a positioning projection with a diameter larger than the positioning protrusion 4 is placed on several steel plates at the top of the core. A protrusion accommodation hole 7 is formed, and a rear part is inserted into the positioning protrusion accommodation hole 7 of the iron core 1 formed previously. It is necessary to accommodate the positioning protrusion 4 of the iron core 1 formed from the . Note that FIG. 9(B) is a bottom view of the main parts of the core, showing the core positioning protrusion 4 and the mounting hole 2. It shows the relationship between

[0011] As shown in FIG. 9, when a large diameter hole 7 is formed at the top of the iron core, as shown in FIG. When the bolt 8 is inserted into the mounting hole 2, the head 8a of the bolt is inserted into the large diameter hole. 7, several steel plates with holes 7 are fixed with bolts. This results in the inconvenience that it becomes impossible to To avoid this, in Figure 11 It is possible to insert a washer 9 between the bolt head 8a and the iron core as shown. However, in this case, the amount of contact between the washer 9 and the iron core is reduced, making it difficult to obtain sufficient mounting strength. and become unable to do so.

0012 For example, if an M6 screw is used as the bolt 8 in FIG. The diameter of the head is 10.5mm. In this case, the inner diameter of mounting hole 2 should be set to about 7 to 7.5 mm. When the thickness of the steel plate is 0.8 to 1.0 mm, the core positioning part 4 must be The inner diameter of the housing hole 7 must be at least about 10 mm. Here, use M6 as washer 9. When using a standard washer (diameter 11.5 mm), the contact distance between the washer and the iron core is approximately 0.75 mm. It's nothing but useless.

[0013] In this way, when providing a core positioning protrusion on the lowest steel plate, Since the lamination of steel plates cannot be incorporated into the progressive lamination process, conventionally the lowest Attaching the steel plates for the core is done in a separate process, which reduces the manufacturing efficiency of the core. This was causing the problem.

[0014] The purpose of this invention is to locate the core without hindrance to the installation of the armature core. To efficiently laminate all steel plates by providing a starting hole and using the progressive lamination method. An object of the present invention is to provide an armature core for a rotating electrical machine that enables the following.

[0015]

[Means to solve the problem]

The armature core for a rotating electric machine according to the present invention has a connecting projection protruding from one side. At the same time, a predetermined number of steel plates having a connecting recess on the back side of the connecting protrusion are laminated, and adjacent The steel plates are connected by fitting the connecting protrusions and the connecting recesses of the steel plates together. It is made of laminated steel sheets.

[0016] The steel plate laminate is provided with a mounting hole passing through the laminate in the laminating direction, and the steel plate laminate is The steel plate placed at one end in the stacking direction of the body has a double plate protruding from the periphery of the mounting hole. A number of core positioning protrusions are provided at intervals in the circumferential direction of the mounting hole. Ru.

[0017] Each core positioning projection of a plurality of steel plates placed on the other end side in the stacking direction of the steel plate stack A positioning protrusion of a size that can loosely accommodate the core positioning is located at a position corresponding to the position of the iron core. A storage hole is provided.

[0018]

[Effect]

As shown above, multiple core positioning protrusions are installed at intervals around the mounting hole. If the positioning protrusion is installed, the hole that accommodates the positioning protrusion will also be spaced around the mounting hole. Therefore, the contact distance between the top steel plate of the steel plate stack and the head of the bolt should be set at ten. It can be secured in minutes. Therefore, there is no problem in installing the iron core. All steel plates can be laminated using the progressive lamination method, improving the manufacturing efficiency of armature cores. can be done.

[0019]

【Example】

Figures 1 to 3 show the application of the present invention to an I-shaped armature core used in a magnet generator. Fig. 1(A) is a top view of the armature core, and Fig. 1(B) is a top view of the armature core. Figure 1(A) is a cross-sectional view taken along the line X-X, and Figure 1(C) is a cross-sectional view of a joint that connects steel plates. It is a diagram. In addition, Figure 2 (A) is manufactured in a state in which they are stacked one on top of the other by the progressive lamination method. FIG. 2(B) is a cross-sectional view showing the iron core of this example, and FIG. 2(B) is a bottom view of FIG. 2(A). C) is a sectional view of the core positioning protrusion provided in the embodiment of the present invention, and FIG. FIG. 3 is a sectional view showing a state in which the iron core of the embodiment is fixed with bolts.

[0020] The armature core 1 of this embodiment has a coil winding portion 1A and both coil winding portions 1A. Consists of magnetic pole parts 1B and 1B formed at the ends, and attached to the magnetic pole parts 1B and 1B, respectively. Holes 2, 2 are formed. The magnetic pole parts 1B, 1B have cylindrical magnetic pole surfaces 3, 3. These magnetic pole faces are connected to the magnetic poles of a magnet rotor (not shown) through a predetermined gap. and was forced to face him. An armature coil is wound around the coil winding portion 1A.

[0021] The iron core 1 is made of a laminated steel plate made by laminating a predetermined number of steel plates punched into a predetermined shape. The steel plates of this steel plate laminate are connected and laminated by a progressive lamination method. this In the example, as shown in FIG. 1(C), each steel plate 100 constituting the steel plate laminate is A cylindrical connecting protrusion 110 is formed by stamping. Hammer out this connecting protrusion After that, a connecting recess 111 consisting of a hole with a circular cross section is formed and connects adjacent steel plates. The protrusion 110 and the connecting recess 111 are fitted into each other. Connection protrusion 110 and connection The concave portions 111 are provided near both ends of each magnetic pole portion 1B.

[0022] In this example, each steel plate is placed at one end side in the stacking direction of the steel plate laminate. A plurality of core positioning protrusions 1 protrude from the periphery of the mounting hole 2 toward one end in the stacking direction. 12 are provided. The plurality of core positioning protrusions 112 are arranged in the circumferential direction of the mounting hole 2. They are placed at equal intervals. In this example, this positioning protrusion 112 is the part between the two notches made in the steel plate as shown in Figure 2(C). It consists of a V-shaped punch. To accurately position the iron core It is desirable to provide at least three core positioning protrusions 112.

[0023] Note that the steel plate at the end where the core positioning protrusion 112 is provided is the same as the other steel plates. It may also be thicker than other steel plates.

[0024] A plurality of steel plates placed on the other end side in the stacking direction of the steel plate laminate are connected to other steel plate laminates. Positioning protrusion housing holes each large enough to accommodate the core positioning protrusions 112 of the body. 113 are provided at equal intervals in the circumferential direction of the attachment hole 2. rank The positioning projection housing hole 113 has a size that allows the positioning projection 112 to be inserted loosely. , its depth is set slightly larger than the protrusion length of the positioning protrusion 112. .

[0025] When manufacturing the above iron core, the punched steel plate is inserted into the already punched steel plate. By stacking and fitting the corresponding connecting protrusions 110 and connecting recesses 111, Adjacent steel plates are successively connected. When punching out the steel plate at the bottom of each core The core positioning protrusions 112 are punched out at the same time. In addition, a predetermined sheet near the top of each core When punching several steel plates, positioning protrusion housing holes 113 are punched out at the same time. Iron core position The punching of the positioning protrusion 112 and the punching of the positioning protrusion housing hole 113 are performed using a punch. This can be done with the same punch by changing the stroke.

[0026] Once one armature core is formed, the lowest steel plate of the next core has already been formed. The next core is stacked on top of the top steel plate, but at this time the next core is stacked on the bottom steel plate. The core positioning protrusion 112 of the steel plate is inserted into the already formed core positioning protrusion accommodation hole. 113, so the next core can already be inserted without being obstructed by the positioning protrusion. It can be formed on top of the already formed iron core. The iron cores formed in sequence are shown in the figure. They are stacked as shown in 2(A). Iron core positioning protrusion 112 and positioning Since it is loosely fitted into the female protrusion housing hole 113, the stacked cores can be easily removed later. can be separated into

[0027] After winding the coil around the above armature core, fix the core to the specified mounting part. In some cases, as shown in FIG. The iron core is positioned by fitting it into the inner periphery of the large diameter portion 6a of the hole 6. Next Insert the bolt 8 into the mounting hole 2 and tighten the screw provided in the small diameter part 6b of the stepped hole 6. The iron core 1 is fixed to the mounting part 5 by tightening the bolt 8.

[0028] In this embodiment, the positioning protrusion housing hole 113 is located outside the head 8a of the bolt 8. Although a part of the positioning projection housing hole 113 is located on the side of the bolt head 8a, There is no problem in placing it below the .

[0029] In the above embodiment, the core positioning protrusion was punched out in a V-shape, but this positioning The shape of the protrusion is arbitrary, and it can also be formed into other shapes such as a circular arc or a U-shape. Ru. In addition, the core positioning protrusion is not limited to the punched out part, but is As shown in 5(A) and (B), the core position can be adjusted by cutting and raising a part of the steel plate. A determining protrusion 112 may also be formed. Positioning protrusion 112 shown in FIG. , the end face of the protrusion 112 located perpendicular to the plane of the drawing is stepped. The iron core can be positioned by applying it to the inner periphery of the large diameter part of the hole. Also When the positioning protrusions shown in FIGS. 5(A) and (B) are provided, the side surface 11 of each protrusion By applying 2a to the inner circumference of the large diameter part of the stepped hole, the core can be positioned. can.

[0030] In the above embodiment, an I-shaped armature core was used as an example, but other types such as annular star-shaped cores, etc. Of course, the present invention can also be applied to iron cores having the shape of .

[0031]

[Effect of the idea]

As described above, according to the present invention, the core positioning protrusions are arranged at intervals around the mounting hole. Since the holes for accommodating the positioning protrusions are also provided as mounting holes, They may be provided at intervals around the . Therefore, the top steel plate and bolt of the steel plate stack All steel plates are laminated using the progressive lamination method, ensuring sufficient contact allowance with the head of the This has the advantage of improving the manufacturing efficiency of the armature core.

[Brief explanation of drawings]

FIG. 1 (A) is a top view showing an embodiment of the present invention;
(B) is a cross-sectional view taken along the line X-X of (A), and (C) is a cross-sectional view showing the shapes of a connecting protrusion and a connecting recess used in the same example.

[Fig. 2] (A) is a cross-sectional view showing a plurality of iron cores stacked when the armature core according to the embodiment of the present invention is continuously manufactured by the progressive lamination method, and (B) is a sectional view of the armature core of the embodiment of the present invention. Bottom view, (C)
FIG. 2 is a sectional view showing a core positioning protrusion used in an embodiment of the present invention.

FIG. 3 is a cross-sectional view showing a state in which the iron core according to the embodiment of the present invention is fixed to a mounting portion.

FIG. 4 is a sectional view showing a modification of the core positioning protrusion provided on the lowermost steel plate in the embodiment of the present invention.

FIG. 5(A) is a bottom view showing another modification of the core positioning protrusion provided on the lowest steel plate in the embodiment of the present invention;
(B) is a sectional view taken along YY line of (A).

FIG. 6 is a sectional view showing a conventional armature core.

FIG. 7 is a sectional view showing the shape of a main part of a conventional armature core having core positioning protrusions that can be manufactured by a progressive lamination method.

FIG. 8 is a sectional view showing a connection structure between steel plates of an iron core manufactured by a progressive lamination method.

[Fig. 9] (A) is a cross-sectional view showing a plurality of cores stacked when continuously manufacturing a conventional armature core by a progressive lamination method, and (B) is a bottom view of (A). .

FIG. 10 is a cross-sectional view showing a state in which the iron core according to the embodiment of the present invention is fixed to a mounting portion.

11 is a sectional view showing an example of the dimensions of each part when the iron core shown in FIG. 9 is fixed to a mounting part using a bolt and a washer.

[Explanation of symbols]

1... Armature core, 1A... Coil winding part, 1B... Magnetic pole part,
DESCRIPTION OF SYMBOLS 110... Connection projection, 111... Connection recess, 112... Iron core positioning projection, 113... Positioning projection accommodation hole, 2... Attachment hole, 3... Magnetic pole surface.

Claims (1)

[Scope of utility model registration request] Claim 1: By stacking a predetermined number of steel plates having a connecting protrusion projecting on one side and having a connecting recess on the back side of the connecting protrusion, and fitting the connecting protrusions and the connecting recesses of adjacent steel plates into each other. It consists of a steel plate laminate in which steel plates are connected to each other, the steel plate laminate is provided with an attachment hole passing through the laminate in the stacking direction, and a steel plate disposed at one end side of the steel plate laminate in the stacking direction, A plurality of core positioning protrusions protruding from the periphery of the mounting hole are provided at intervals in the circumferential direction of the mounting hole, and a plurality of core positioning protrusions are provided at intervals in the circumferential direction of the mounting hole, and a plurality of core positioning protrusions are provided at intervals in the circumferential direction of the mounting hole. An armature core for a rotating electric machine, wherein a positioning projection housing hole having a size that can loosely accommodate the core positioning projections is provided at a position of the steel plate corresponding to each of the core positioning projections.